turck Articles

IRC Interface-Applications

TURCK 9/11/2018

In combination with I/O sockets and the plug-in jumpers, the IRC relay series permits low-cost, clearly arranged and reliable realisation of interface circuits for the input and output ends of PLC and control systems.

S10-M and S12 sockets with one and two contacts, with inputs in series and identical arrangement of the contacts.

Identical order of coil and contacts on both sockets.

Coil terminal at level 1: (A2, A2, A1)
Power terminals at level 1: (12, 11, 14)
Power terminals at level 2: (22, 21, 24)




All plug-in jumpers are insulated. The plug-in jumpers at the drive end (coil) can be split manually to the required length, thus enabling the creation of any required interface groups.

The jumpers are available in the colours grey, blue and red.

Colours used by RELECO in the relays' test buttons:
- Blue for DC circuits
- Red for AC circuits

B20 plug-in jumpers for the control end


V40 and V10 plug-in jumpers for the power end


IRC – Interface Applications

Total interconnection, bridge bars for coil and power lines

Power bridge bars for sockets S10-M and S12

V40 bridges join four similar points in four aside adjacent sockets. They can join up either among themselves or to V10 units, to bridge an unlimited number of sockets S10-M and S12 in any combination.
V10 bridges are units to connect a single socket to the next one, so you bridge less or more than 4 sockets.
Made of copper with a current capacity of 40 A.



Coil bridge bars for sockets S10-M and S12

B20 bridges points A2, internally connected, of every aside adjacent socket S10-M or S12.

Each element connects point 6 of the first socket to point 5 of the next one, always leaving free the point 5 of the first socket and the point 6 of the last one, to con- nect the common polarity cable.


This issue replaces all previous issues. Availability, errors and specifications subject to change without notice.

IRC - Interface-Applications

Jumper connection on S1O-M and S12 sockets
The S10-M and S12 sockets and the new connection jumpers B20, V10 and V40 enable easy and fast wiring of rows of relays. The jumpers can be used in a mixed configuration of S10-M and S12 sockets.

Different jumper colours allow clear identification. This results in fewer errors, lower assembly costs and easier inspection and maintenance work. Available in grey (standard), red (AC) and blue (DC), in conformity with the colour coding used by Comat Releco for test buttons for relay identification.

Attention needs to be paid only to the total current. At higher currents and also for safety reasons, a current supply at the start and end of a jumpered connection is recommended.

V40 plug-in jumpers for the power end
Contacts can be linked to the power ends with the aid of these jumpers. Normally, these are the changeover contacts, terminal 11 or 21. The jumpers can also be used to jumper NC or NO plug-in terminals. V40 jumpers link four identical contacts of four neighbouring sockets. They can either be linked to one another or to V10 jumpers to jumper a number of sockets in any combination.

V10 plug-in jumpers for the power end
V10 jumpers can be used to link individual sockets to one another in groups. A combination of V40 and V10 jumpers is possible, depending on the number of sockets.


B20 plug-in jumpers for the control end
The Comat Releco sockets S10-M and S12 are accessible via the plug-in terminals 5 and 6 for A2 (internal connection). Each element links terminal 6 of the first socket to 5 of the next socket, and 5 of the first socket and 6 of the last socket are always left free to connect the cable. The jumper B20 consists of four coherent parts, which can be separated, however.

IRC series/CSS
Semiconductor relays as an interface to PLC and control systems

The CSS semiconductor switches have a useful life that is practically unlimited in terms of switching cycles. They operate without bounce and permit a high switching frequency.

All versions feature an electrically isolated input for 5 to 32 V DC. The inputs are characterised by a minimum delay with a simultaneously high interference immunity.

DC semiconductor switches
There are two versions with identical performance data. The CSS-DCN version has the common negative terminal 2, and the load is connected to terminal
1. The CSS-DCP has the common positive terminal at terminal.
2. The load is connected to terminal 1. This corresponds to an NPN or PNP switch.

AC switches
The CSS-AZ version switches synchronously, i.e. it switches during the passage through zero. The CSS-AC version switches asynchronously, i.e. the semiconductor switch switches through, independently of the phase, at the moment of detected triggering.

DC applications with mixed components

IRC-Interface-Applications IRC-Interface-Applications

AC applications with mixed components